抛出异常的对象在堆栈，mem泄漏与新？ [英] throwing exceptions of objects on the stack, mem leak with new?

问题描述

这是一个错误：

if(some_error)
  throw Cat("Minoo");

其中Cat是类。

然后在一些其他函数中调用抛出异常的方法...

Then in some other function that called the method that threw the exception...

catch(const Cat &c)
{ 
}

如果无效，我使用新的Cat（Minoo）;

If it is invalid, do I use new Cat("Minoo");

会导致内存泄漏吗？

推荐答案

？不，这正是你应该做的：抛出一个对象。 throw语句中的对象可以在堆栈上，但是在抛出时会被复制。比较，例如，执行返回Cat（Minoo）的效果;

1) Invalid? No, that's precisely what you're supposed to do: throw an object. The object in the throw-statement may be on the stack, but it is copied when it is thrown. Compare, for example, the effect of executing return Cat("Minoo");

2）会抛出一个指针，导致指向的对象被泄露吗？是的，如果对象是在堆上分配的，除非你安排删除它。但你应该避免将指针作为一般规则。

2) Will throwing a pointer cause the pointed-to object to be leaked? Yes, if the object was allocated on the heap and unless you arrange to delete it. But you should avoid throwing pointers as a general rule.

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